I just found out yesterday that the Selenium project will have a new home at the OpenQA site.
OpenQA is a JIRA-based site created by Patrick Lightbody, who intends it to be a portal for open-source testing-related projects. Selenium is the first such project, but Patrick will be adding another one soon: a test management application he's working on.
I'll be copying over some Wiki pages from the current Selenium Confluence wiki to the new Open QA wiki. OpenQA is very much a work in progress, so please be patient until it's getting fleshed out some more.